1 files changed, 24 insertions, 0 deletions

diff --git a/mm/cma.h b/mm/cma.h
new file mode 100644
index 000000000000..1132d733556d
--- /dev/null
+++ b/mm/cma.h
@@ -0,0 +1,24 @@
+#ifndef __MM_CMA_H__
+#define __MM_CMA_H__
+
+struct cma {
+        unsigned long   base_pfn;
+        unsigned long   count;
+        unsigned long   *bitmap;
+        unsigned int order_per_bit; /* Order of pages represented by one bit */
+        struct mutex    lock;
+#ifdef CONFIG_CMA_DEBUGFS
+        struct hlist_head mem_head;
+        spinlock_t mem_head_lock;
+#endif
+};
+
+extern struct cma cma_areas[MAX_CMA_AREAS];
+extern unsigned cma_area_count;
+
+static unsigned long cma_bitmap_maxno(struct cma *cma)
+{
+        return cma->count >> cma->order_per_bit;
+}
+
+#endif